CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
12.6%
The Kubernetes kubelet component in versions 1.1-1.16.12, 1.17.0-1.17.8 and 1.18.0-1.18.5 do not account for disk usage by a pod which writes to its own /etc/hosts file. The /etc/hosts file mounted in a pod by kubelet is not included by the kubelet eviction manager when calculating ephemeral storage usage by a pod. If a pod writes a large amount of data to the /etc/hosts file, it could fill the storage space of the node and cause the node to fail.
[
{
"product": "Kubernetes",
"vendor": "Kubernetes",
"versions": [
{
"status": "affected",
"version": "1.15"
},
{
"status": "affected",
"version": "1.14"
},
{
"status": "affected",
"version": "1.13"
},
{
"status": "affected",
"version": "1.12"
},
{
"status": "affected",
"version": "1.11"
},
{
"status": "affected",
"version": "1.10"
},
{
"status": "affected",
"version": "1.9"
},
{
"status": "affected",
"version": "1.8"
},
{
"status": "affected",
"version": "1.7"
},
{
"status": "affected",
"version": "1.6"
},
{
"status": "affected",
"version": "1.5"
},
{
"status": "affected",
"version": "1.4"
},
{
"status": "affected",
"version": "1.3"
},
{
"status": "affected",
"version": "1.2"
},
{
"status": "affected",
"version": "1.1"
},
{
"lessThan": "1.18.6",
"status": "affected",
"version": "1.18",
"versionType": "custom"
},
{
"lessThan": "1.17.9",
"status": "affected",
"version": "1.17",
"versionType": "custom"
},
{
"lessThan": "1.16.13",
"status": "affected",
"version": "1.16",
"versionType": "custom"
}
]
}
]